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1.发明授权Optically-based location system and method for determining a location at a structure 有权用于确定结构位置的光学定位系统和方法公开(公告)号：US06865347B2
公开(公告)日：2005-03-08
申请号：US09755707
申请日：2001-01-05
摘要： An optically based location system and method of determining a location at a structure include a lighting infrastructure having lights at a structure. Each light is configured to illuminate and to transmit a respective relative or absolute terrestrial position through modulation of emitted light. An optical receiver is configured to detect the lights, to demodulate the position of detected lights, and to determine from the detection a position of the receiver. The receiver can have a conventional optical detector for determining a two-dimensional position of the receiver relative to a detected light, or can have a three-dimensional spot collimating lens and charged couple device optical detector for determining a three-dimensional position of the receiver relative to a detected light. The receiver and lights can be synchronized for converting a delay time into a distance measurement to calculate a distance between a light and the receiver.
摘要翻译： 基于光学的位置系统和确定结构处的位置的方法包括在结构处具有光的照明基础设施。 每个光被配置为通过调制发射的光来照亮并发射相应的相对或绝对的地面位置。 光接收器被配置为检测光，解调检测到的光的位置，并且从检测确定接收器的位置。 接收机可以具有用于确定接收器相对于检测到的光的二维位置的常规光学检测器，或者可以具有用于确定接收器的三维位置的三维点准直透镜和电荷耦合器件光学检测器 相对于检测到的光。 接收器和灯可以同步，以将延迟时间转换成距离测量，以计算光和接收器之间的距离。
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公开(公告)号：US06853445B2
公开(公告)日：2005-02-08
申请号：US10041052
申请日：2002-01-07
摘要： A device for detecting the direction of a light source. The device has a pin-hole lens that allows a collimated light beam to excite a light sensing surface behind the lens. The output from the light sensing surface is passed to a processor that determines the position of the surface that has been excited and the direction of the light source. When the position of one or more light sources is known, the device may further determine its own position. The devices may be used in a location system to provide known reference points to a network of other devices. The light sources may be modulated, in which the device can select or identify a particular light source based upon its modulation pattern.
摘要翻译： 一种用于检测光源方向的装置。 该器件具有一个针孔透镜，允许准直光束激发透镜后面的感光表面。 来自感光表面的输出被传递到确定被激发的表面的位置和光源的方向的处理器。 当已知一个或多个光源的位置时，该装置可以进一步确定其自身的位置。 这些设备可以用在位置系统中，以向其他设备的网络提供已知的参考点。 可以调制光源，其中设备可以基于其调制模式来选择或识别特定光源。
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公开(公告)号：US08384572B2
公开(公告)日：2013-02-26
申请号：US12985044
申请日：2011-01-05
申请人： Tzer-Hso Lin , Yuanchang Liu , Donald C. D. Chang
发明人： Tzer-Hso Lin , Yuanchang Liu , Donald C. D. Chang
IPC分类号： H03M1/20
CPC分类号： H03M1/002 , H03M1/0641 , H03M1/08 , H03M1/12 , H03M1/1205 , H03M1/1215 , H03M1/188 , H03M1/20 , H04B1/0475 , H04B1/123 , H04B7/10 , H04L27/06
摘要： A novel noise injection technique is presented to improve dynamic range with low resolution and low speed analog to digital converters. This technique combines incoming signal and noise signal with wave front de-multiplexer and split into several channels. Then low resolution and low speed analog to digital converters are used to sample each channels. All signals are recovered using wave front multiplexer. For advanced design, ground diagnostic signals with optimizing processor can be added to guarantee recovery quality.
摘要翻译： 提出了一种新颖的噪声注入技术，通过低分辨率和低速模数转换器来改善动态范围。 该技术将输入信号和噪声信号与波前解复用器相结合，并分为多个通道。 然后使用低分辨率和低速模数转换器对每个通道进行采样。 所有信号使用波前复用器进行恢复。 对于先进的设计，可以添加具有优化处理器的接地诊断信号，以保证恢复质量。
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公开(公告)号：US20150263821A1
公开(公告)日：2015-09-17
申请号：US14728980
申请日：2015-06-02
申请人： Juo-Yu Lee , Donald C.D. Chang , Tzer-Hso Lin
发明人： Juo-Yu Lee , Donald C.D. Chang , Tzer-Hso Lin
IPC分类号： H04J14/06
CPC分类号： H04J14/06 , H01Q21/245 , H04B7/18504 , H04B7/18513
摘要： Presented are methods that utilize wavefront multiplexing for enabling linearly-polarized terminals to access circularly-polarized satellite transponders. The methods disclosed herein feature (1) polarization formation capability that renders transmitted signal conditioned on circularly-polarized channels through multiple linearly-polarized feeds, and (2) polarization-conversion capability that compensate path differentials introduced by electromagnetic wave propagation channels. Data streams to be transmitted are pre-processed by a wavefront multiplexer into multiple wavefront components in linear polarization formats, where signals from respective data streams are replicated into linearly-polarized sub-channels. These replicated data streams are linked via a unique complex weighting vector (amplitude and phase or their equivalents), or “wavefront”, which are also linked by various spatially independent wavefronts. Additionally, a probing signal is sent on the transmitting side and linked via some of the independent wavefronts. Aggregated signals in linearly-polarized sub-channels are unique linear combinations of all input data streams. Aggregated signals in turn appear in circularly-polarized formats and propagate through circularly-polarized channels including circularly-polarized satellite transponders and a circularly-polarized teleport on the receiving side. Correlation between the circularly-polarized signal and the probing signal is sent back to the transmitting side that drives the polarization-conversion function toward the optimal state such that this correlation is lower than a pre-defined level. Accordingly, an optimally configured satellite communication system either (1) enables the linearly-polarized terminal on the transmitting side to access right-hand circularly-polarized satellite transponder without interfering the left-hand circularly-polarized satellite transponder, or (2) enables the linearly-polarized terminal on the transmitting side to access left-hand circularly-polarized satellite transponder without interfering the right-hand circularly-polarized satellite transponder.
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公开(公告)号：US20120062404A1
公开(公告)日：2012-03-15
申请号：US12985044
申请日：2011-01-05
申请人： Tzer-Hso Lin , Yuanchang Liu , Donald C.D. Chang
发明人： Tzer-Hso Lin , Yuanchang Liu , Donald C.D. Chang
CPC分类号： H03M1/002 , H03M1/0641 , H03M1/08 , H03M1/12 , H03M1/1205 , H03M1/1215 , H03M1/188 , H03M1/20 , H04B1/0475 , H04B1/123 , H04B7/10 , H04L27/06
摘要： A novel noise injection technique is presented to improve dynamic range with low resolution and low speed analog to digital converters. This technique combines incoming signal and noise signal with wave front de-multiplexer and split into several channels. Then low resolution and low speed analog to digital converters are used to sample each channels. All signals are recovered using wave front multiplexer. For advanced design, ground diagnostic signals with optimizing processor can be added to guarantee recovery quality.
摘要翻译： 提出了一种新颖的噪声注入技术，通过低分辨率和低速模数转换器来改善动态范围。 该技术将输入信号和噪声信号与波前解复用器相结合，并分为多个通道。 然后使用低分辨率和低速模数转换器对每个通道进行采样。 所有信号使用波前复用器进行恢复。 对于先进的设计，可以添加具有优化处理器的接地诊断信号，以保证恢复质量。
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公开(公告)号：US09692549B2
公开(公告)日：2017-06-27
申请号：US14728980
申请日：2015-06-02
申请人： Juo-Yu Lee , Donald C. D. Chang , Tzer-Hso Lin
发明人： Juo-Yu Lee , Donald C. D. Chang , Tzer-Hso Lin
CPC分类号： H04J14/06 , H01Q21/245 , H04B7/18504 , H04B7/18513
摘要： Presented are methods that utilize wavefront multiplexing for enabling linearly-polarized terminals to access circularly-polarized satellite transponders. The methods disclosed herein feature (1) polarization formation capability that renders transmitted signal conditioned on circularly-polarized channels through multiple linearly-polarized feeds, and (2) polarization-conversion capability that compensate path differentials introduced by electromagnetic wave propagation channels. Data streams to be transmitted are pre-processed by a wavefront multiplexer into multiple wavefront components in linear polarization formats, where signals from respective data streams are replicated into linearly-polarized sub-channels. These replicated data streams are linked via a unique complex weighting vector (amplitude and phase or their equivalents), or “wavefront”, which are also linked by various spatially independent wavefronts. Additionally, a probing signal is sent on the transmitting side and linked via some of the independent wavefronts. Aggregated signals in linearly-polarized sub-channels are unique linear combinations of all input data streams. Aggregated signals in turn appear in circularly-polarized formats and propagate through circularly-polarized channels including circularly-polarized satellite transponders and a circularly-polarized teleport on the receiving side. Correlation between the circularly-polarized signal and the probing signal is sent back to the transmitting side that drives the polarization-conversion function toward the optimal state such that this correlation is lower than a pre-defined level. Accordingly, an optimally configured satellite communication system either (1) enables the linearly-polarized terminal on the transmitting side to access right-hand circularly-polarized satellite transponder without interfering the left-hand circularly-polarized satellite transponder, or (2) enables the linearly-polarized terminal on the transmitting side to access left-hand circularly-polarized satellite transponder without interfering the right-hand circularly-polarized satellite transponder.
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